Home / 20,896.19-31,355.06-13,881.05

Finding the Fourth Proportional to 20,896.19, 31,355.06 and 13,881.05

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Solution

The fourth proportional to 20,896.19, 31,355.06 and 13,881.05 is: 20,828.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.19 : 31,355.06 = 13,881.05 : x
  2. Step 2: Convert to fraction form
    20,896.19/31,355.06 = 13,881.05/x
  3. Step 3: Cross multiply
    20,896.19x = 31,355.06 × 13,881.05
  4. Step 4: Simplify right side
    20,896.19x = 435,240,929.43
  5. Step 5: Solve for x
    x = 435,240,929.43/20,896.19
  6. Step 6: Final answer
    x = 20,828.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.